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Yes, that’s what I meant. They don’t want to throw away the Elisp but they want to support a Scheme.

Someday in the far far future long after Scheme is supported and millions of lines is rewritten in Scheme, I could imagine dropping support for Elisp.

Then Emacs will be nothing more than a large Scheme program that could run on any implementation of Scheme

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I think it's easier to port everything elisp to Scheme (with some help by automation perhaps), than having an Emacs implementation in a Scheme that runs in all implementation of Scheme. I've worked many years in Scheme and the differences between compilers and interpreters are too large, especially when it comes to low-level functionality necessary for good performance.

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